Boiler-maker&#39;s tool



' May 27, 1924.

w. A. FINDLEY M/l/am H. find/ Aiii.

Patented May 27, 1924.

ATE-INT GEE-16E.

WILLIAM A. FINDLEY, or SAN FRANCISCO, cepiroama.

BO'ILER-MAKERS TOOL.

Application filed November 18, 1922. Serial No. 601,862. i

.State of California, have invented a new and useful Improvement in a Boiler-Makers Tool, of which the following is a specification.

My invention relates to improvements in tools for use by boiler makers and the like for expanding and beading tubes upon the heads of boilers, and for severing said tubes from boilers for replacement and repair.

The primary object of my invention is to provide an improved tool of the character described.

Another object is to provide an improved construction facilitating the adaptation of the tool for different operations.

A further object is to provide an improved tool having improved means for expanding a tube into a head.

A still further object is to provide an improved tool of the character described provided with means for severing a tube within a boiler and removing the severed end from the head.

Another object is to provide an improved expanding block arranged to exert a maximum pressure against the tube with a minimum of strain upon the tool.

Another object is to provide an improved construction by which the manufacture and assembly is simplified and a more rugged and durable tool obtained at a reduced cost.

I accomplish these and other objects by means of the device disclosed in the draw ings forming apart of the present specification wherein like characters of reference are used to designate similar parts throughout said specification and drawings and in which:

Figure 1 is a side elevation of my improved tool showing the manner in which the carrier is pivotally moved to receive a hammer.

Fig. 2 is a side elevation showing the manner in which the tool is applied to the end of a boiler tube to expand and head the same upon a boiler head.

Fig. 3 is a similar view showing the manner in which a tube is severed within a boiler.

Fig. 4 is a view of the tool fitted with a hammer arranged to cut the severed end of a tube from the head.

This invention is an improvement upon my former Patent Number 1,381,406, dated June 14th, 1921, and consists of the improved construction and arrangement of parts shown which material simplifies the construction and operation of the device and broadens the field of usefulness.

Referring to the drawings the numeral 1 is used to designate a core adapted for insertion into the end of a boi-ler tube 2 fitted into an aperture formed in the head? 'of a boiler. A carrier 41S pivotally mounted at one end of the core 1 upon a bearing pin 6 carried by extensions 7 formed upon said core and extending through a lateral extension 8 formed upon the carrier. The carrier 41 is provided with an axial bore arranged to receive the body of a hammer 9 provided with a shank 11 adapted for connection to a suitable reciprocating means such as an air hammer,not'shown.

The bore of the carrier and consequently the hammer 9 is normally held in operative alignment with a groove 12 formed upon the core and arranged to receive the hammer by means of a spring 13 mounted within a recess 14 formed in'the core 1, said spring being arranged to press against the extension 8 and thus turn the carrier about the pin 6 to the operative position.

The core 1 is provided with a transversely disposed slot 16 extending through the core and opening into the groove 12. In the preferred construction the ends of the slot 16 are inclined slightly as shown in Figs. 2 and 3 of'the drawings for a reason that will hereinafter more fully appear.

A block 17 is slidably fitted into the slot 16, said block being provided with an expanding surface 18 arranged to engage the inner surface of the tube 2 opposite the head 3. A shoulder 19 is formed immediately back of the surface 18 to engage the tube immediately back of the head? A striking face 21 is formed upon the block upon the side opposite the surface 18 and shoulder 19, said face 21 being normally disposed within the groove 12 in alignment with the hammer 9 and inclined at an angle adapted to cause a transverse movement of the block when struck by the hammer.

The hammer 9 is provided with a shoulder 22 arranged to engage the outer end of the tube, a plurality of hammers having shoulders 22 of various shapes adapted to perform different operations uponthe tube be formed upon ing provided for use with each tool. Each hammer is provided with a forward extension 23 having an inclined striking surface 2% corresponding with the face 21 of the block 17 with which it is normally aligned. When the hammer is reciprocated in the usual manner the shoulder 22 is caused to force the end of the tube 2 to the desired shape, and at the same time the surface .2; is caused to engage the striking face 21 and thereby force the block against the tube adjacent the head 3, the surface 18 expanding the tube tightly into the head and maintaining alignment, while the shoulder 19 is caused to expand the tube immediately back of the head. A shoulder 26 is the core 1 to limit the movement of the same into the tube and to obtain a correct positioning of the shoulder 19 with regard to the head 3.

The slot 16 and the block 17 are slightly tapered toward the side oppositethe ham mer in order to prevent the removal of the block except through the groove 12 as hereinafter more fully described.

As above mentioned the tool is designed for use with a plurality of hammers 9 any one of which may be inserted in the carrier to carry out its particular portion of an operation. In Fig. 1 of the drawings 1 have illustrated the manner in which the hammers may be inserted and withdrawn from the carrier. a hammer 9 being shown in operative position. in full lines. When it is desired to remove the hammer and substitute another, the carrier is moved pivotally about its bearing pin 6. against the pressure of the spring 13, to the position shown in dotted lines. The hammer may be now moved outwardly past the core 1 as shown in dotted lines, and another hammer of a desired character substituted in its place. When a hammer is being placed in the carrier, the

shank 11 is inserted in the bore of the carrier and SUlllClGIlt force applied upon the shouldered end of the hammer to cause the carrier to be swung outwardly sufiiciently to admit the body portion of the hammer, the hammer then. being advanced until the shouldered end drops into the groove 12. This feature of my invention is of particu lar importance as it permits the use of a great variety of hammers each especially designed to do a particular operation with maximum efliciency, said hammers being so easily interchanged in the manner above described as to cause no appreciable delay be tween successive operations.

in the drawings 1 have illustrated the types of hammer most useful in ordinary practice. In Figs. 1 and 3 I have shown a hammer having an outwardly inc-lined shoulder 22 arranged to engage the outer end of the tube and spread the same. When the tube has been spread, or flared, a hammer having the shape shown in Fig. 2 of the drawings is inserted in the carrier in place of the hammer used in the preceding operation. The shoulder 22 of this hammer engages the flared end of the tube and turns the same back against the head 3 and shapes the end into a bead substantially as shown. As the end of the tube is turned bark and the hammer is thus permitted to advance further, the striking surface 2 1 will engage the face 21 of the block 1'7 and thereby drive the block against the tube at the opposite side of the core, the surface 18 and shoulder 19 being thus caused to expand the tube as shown. The arrangement of the inclined striking surfaces is to be particularly noted in this connection, as by this means the force is divided into components so that the greater portion of the force Wlll be directed in the line of movement of the block 17 and very little strain thrown upon the core itself, the slight inclining of the slot further in-- creases the component of force useful for expanding the tube and reduces the component directed upon the core.

The block is readily removable from the core 1 through the slot 12 when the hammer is withdrawn from the carrier. This permits the block to be omitted entirely if it is not desired to expand the tube within the head as is frequently the case with water tube boilers. l urthermore, it permits the block 17 ordinarily used to be replaced with another block having a different shoulder 19 such as is illustrated in Fig. 3 of the drawings. Here it will be noted that the shoulder has been extended and formed into a cutting edge 25 such that when the block is forced against the tube by the hammer 9, the cutting edge will sever the tube immediately back of the head 3. The block is in other respects the same above described and may be actuated by any of the several haiumers all of which are provided with the extension 23 and striking surface 24%.

The above described means for severing the tubes within the boiler n'iaterially facilitates the removal of tubes for replacement when the same have become damaged or burned out. To facilitate the removal of the portion of tube which is firmly expanded into the head 3 I have provided a hammer 9 provided with a shoulder 27 shaped to form a cutting edge 28 as shown in Fig. 1 of the drawings. The cutting portion is made of a height that when the core is seated within the end of the tube the cutting edge will engage the thickness of the tube andas the hammer is reciprocated the cutting edge will be driven through the tube and a longitudinal cut made therethrough. A light blow with a chisel will now serve to break away the end of the tube and render the same readily removable.

In practice the core 1 is adapted for use with a particular size of boiler tube, and cores are provided for any desired size of tube.

The carrier is made with an enlarged portion 29 shaped to form a grip by which the tool may be readily held to the work. When in operation the tool is turned within the tube so that all portions of the end of the tube are expanded and beaded, or peripherally cut uniformly, except when the longitudinally cutting out hammer above mentioned is in use, in which case the tool is, of course, held in a fixed position.

From the above description and the drawings referred to it will be seen that my improved device is made of a very small number of parts each of which is in itself of simple and rugged construction which may be easily made and which will afford great strength. No close machining is required upon any of the parts and the assembly is extremely simple.

I have disclosed what I now consider to be the preferred construction of my invention and have described its principal fields of utility, but it is to be understood that I expressly reserve any modification which may fall within the scope of the appended claims.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

1. A tool of the character described comprising a core adapted for insertion into the end of a boiler tube; a carrier mounted upon one end of the core, said carrier'being pivotally movable to receive any of a plurality of hammering tools adapted for slidable mounting therein; and means for normally holding said carrier in operative position with the tool in alignment with the material to be struck thereby.

2'. A tool of the character described comprising a core adapted for insertion into the end of a boiler tube; acarrier mounted upon one end of the core, said carrier being pivotally lovable to receive any of a plurality of hammering tools adapted for slidable mounting therein; a block slidably mounted within a slot formed transversely within the core and having a shoulder arranged to en the tube, there being a striking face formed upon the block in alignment with the hammer to be struck thereby whereby the block is moved to force the shoulder against the tube.

A tool of the character described comprising a core adapted for insertion into the end of a boiler tube; a carrier mounted upon one end of the core, said carrier being pivotally movable to receive any of a plurality of hammering tools adapted for slidable mounting therein; a block slidably mounted within a slot formed transversely within the core and having a shoulder arranged to engage the tube, there being a striking face it formed upon the block in alignment with the hammer to be struck thereby whereby the block is moved to force the shoulder against the tube; and means for normally holding the carrier in operative relation to the core to align the hammer with the tube and the striking face of the block.

4. A tool of the character described comprising a core adapted for insertion into the an inclined striking face formed upon the opposite side of the block in alignment with Eli the hammer to be engaged thereby when the hammer is reciprocated whereby the shoulder may be moved to engage the tube adjacent the inner side of a head.

5. A tool of the character described comprising a core adapted for'insertion into the end of a boiler tube; a carrier mounted upon one end of the core, said carrier being pivotally movable to permit the insertion and removal of any of a plurality of hammers adapted for reciprocating movement therein; a block, slidably and removably mounted within a transversely disposed slot formed in the core; a shoulder formed upon one side of the block to engage the tube, there being an inclined striking face formed upon the opposite side of the block in alignment with the hammer to be engaged thereby when the hammer is reciprocated whereby the shoulder may be moved to sever the tube upon the inner side of a boiler head upon which said tube is mounted. v

6. A tool of the character described comprising a core adapted for insertion into the end of a boiler tube; a carrier mounted upon the end of the core and having a longitudinal bore normally aligned with a groove formed inthe adjacent portion of the core; a hammer mounted within the bore and groove, said carrier being pivotally movable relative to the core to admit a shank formed upon the hammer and adapted for reciprocating movement within the carrier; and means for returning the carrier to normal position after said carrier has been moved to permit insertion or removal of a hammer.

7 A tool of the character described comprising a core adapted for insertion into the end of a boiler tube; a carrier mounted upon one end of the core and having a longitudinal bore normally aligned with a groove formed in the adjacent portion of the core; a hammer mounted within the bore and opposite groove, saidearrier being pivotally movable relative to the core to move the bore out of alignment with the core and thereby permit the insertion and Withdrawal of a hammer; and a spring mounted between the core and the carrier for returning the carrier to norinal position after a pivotal movement.

8. A tool of the character described comprising a core adapted for insertion into the end of a boiler tube and having a longitudi nal bore normally aligned with a groove formed in the side of the core; a hammer having a shank slidably mounted Within the bore of the carrier; a block slidably mounted within a transversely disposed slot formed in the core; a shoulder torn ed upon the block and arranged to engage the tube adjacent a boiler head within which the tube is to be secured, there being an inclined striking face formed upon the block upon the side the shoulder and normally positioned Within the groove in alignment with the hammer whereby a downward pressure will be imparted thereby against the block to force tie shoulder the tube when the hammer is moved to strike the block.

9. A. tool of the character described comprising a core adapted for insertion into the end of a boiler tube; a carrier mounted upon one end of the core; a reciprocating hammer mounted Within the carrier; a block slidably mounted within a slot formed in the masses core, one side of said block being arranged to en age the inner surface of the tube, there i \7 an inclined striking surface formed upon the opposite side of the block and a correspondingly inclined striking surface formed upon the end of the hammer in alignment With the striking surface of the block; and a shoulder formed upon the hammer to engage the outer end of the tube whereby reciprocation of the hammer will cause blows to be struck by the hammer upon the outer end of the tube and upon the inclined striking 'ace of the block to drive said block against the tube.

10. In a tool of the character described, the combination with a core adapted for insertion into the end of a boiler tube, a carrier mounted in connection with the core, and a reciprocating hammer mounted Within tl e carrier of a block slidably mounted Within a transversely disposed slot formed in the core and arranged to be struck by the hammer; and a cutting shoulder formed upon the bloclt and arranged to engage the tube immediately back of a boiler head upon which the tube is secured, said cutting; edge being adapted to sever the tube Within the boiler.

In Witness whereof I hereunto set my sig' nature.

"WlLLlAlll A. FINDLEY. 

